/Engine/Source/Runtime/AIModule/Classes/BehaviorTree/BTFunctionLibrary.h
Initialize variables marked as "instance memory" and set owning actor for blackboard operations
static void StartUsingExternalEvent ( [UBTNode](API\Runtime\AIModule\BehaviorTree\UBTNode) * NodeOwner, [AActor](API\Runtime\Engine\GameFramework\AActor) * OwningActor )